Insulating-support for electric



(N0 Model.)

J. N. BULKLEY. INSULATING SUPPORT FOR ELEGTRIG WIRES.

Patented Sept. 24, 1895.

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JOSEPH N. BULKLEY, OF RIDGVVAY, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE GENERAL ELECTRIC COMPANY, OF NEW YORK.

INSULATING-SUPPORT FOR ELECTRIC WIRES.

SPECIFICATION forming part of Letters Patent No. 5&6,837, dated September 24, 1895.

Application filed March 4, 1895- Serlal No. 540,392- (No model.)

To all whom it may concern.-

Be it known that I, JOSEPH N. BULKLEY, a citizen of the United States, residing at Ridgway, in the county of Elk, State of 'Pennsyh Vania, have invented certain new and useful Improvements in Insulating Supports for Electric IVires, of which the following is a specification.

This invention relates to insulating-supports for electric wires adapted to be used for suspending trolley and other wires in underground work.

The invention has for its object to provide an improved insulating-support of this character which shall be economical, simple in construction, and of great utility.

The invention consists in an insulating-support for electric wires and in details thereof, as hereinafter set forth and claimed.

In the accompanying drawings, Figure 1 is a view of an insulating-support for electric wires constructed in accordance with this invention and showing its use in connection with a trolley wire in underground work. Fig. 2 is a detail view of one of the parts of the device constituting the invention.

I11 the construction shown, indicating one way of employing the invention, 1 is a bar of wood or other insulating material, from which is suspended a trolley-wire bracket 2, supporting the trolley-wire 3. The bar 1 is held up against the ceiling 4; of the mine or other underground foundation by means of bolts 5, passing through bolt-holes in the bar 1 and projecting into suitable holes 6, bored in the ceiling 4, the inner headed ends of the bolts 5 abutting against the inner ends of the holes 6.

- The holes 6 are of a diameter suitable to receive the two sections 7 when placed in the position shown in Fig. l in the holes 6, one section having its inner end resting against the head of the bolt 5 and the other section projecting partly out of the hole 6 and lying against a portion of the upper section. These sections 7, when laid together outside of the holes 6, form a short section of a tube and are each of a diagonal shape, as shown, so that when the lower one is pushed into the holes 6 against the upper one, as already-referred to, it will be wedged into place between the sides of the hole 6 and the upper section 7, as

shown in Fig. 1. Now by applying nuts 8 to the lower end of the bolts 5, with suitable washers 9 inserted between the nuts 8 and the bar 1, and by screwing up said nuts 8 the pressure of the bar 1 against the lower section 7 in each hole 6 will cause the lower section 7 to be wedged firmly against the upper section 7, as already indicated.

In lieu of the nuts 8 any other suitable means may be employed in connection with the bolts 5 for wedging the lower section 7 into the hole 6. By this meansa simple construction is afforded for firmly wedging the bolts 5 in the holes 6 and securely supporting the insulating-bar 1 in position. The sections 7, being of a simpleform, as shown, are readilymanufactured and are easily slipped into position in each hole 6 about the bolt 5 and can easily be withdrawn when it is desired to remove the bolts 5.

While the invention has been set forth as employed in connection with a trolley-wire support, it is obvious that it may be used in any other situation to form an overhead insulating-support for electrical wires of any kind.

Having described my invention, what I claim is- 1. An insulating support for electric wires, consisting of an insulating bar adapted to support a bracket for electric wires, in combination with a ceiling or other solid support provided with holes, bolts passing through said insulating bar and projecting into said holes, and wedgeshaped sections of a tube located in said holes, said wedge-shaped sections being diagonal from end to end and overlapping each other in wedging relation, and the lower wedge-shaped tubular section projecting from said hole and abutting against the insulating bar, and means on the outer end of said bolts for tightening up the said bar against the lower wedge-shaped tubular sections and wedging them into said holes.

2. In an insulating support for electric wires, the combination, with an insulating bar, of bolts and nuts and wedge-shaped tubular sections adapted to be disposed about said bolts in wedging relation to one side of said insulating bar, said wedge shaped sections being diagonal from end to end, and overlapping each other in wedging relation.

3. In an insulating support for electric Wires, a headed bolt and nut, in combination with Wcdging tubular sections, diagonal from end to end, adapted to fit over said bolts and 5 be arranged to overlap each other in wedging relation to each other.

at. In an insulating support for electric wires, a fastener for securing an insulating support to an overhead ceiling or other founro elation, consisting of a headed bolt and nut and a short section of a tube composed of two longitudinal tubular sections diagonal from end to end and adapted to surround the bolt and be in Wedging relation to each other.

In Witness whereof I have hereunto set my 15 hand this 26th day of February, 1805.

JOSEPH N. BULKLEY. Witnesses:

W. O. RANKIN, W M. II. HOLADAY. 

